公开(公告)号：US20110170875A1

公开(公告)日：2011-07-14

申请号：US12940131

申请日：2010-11-05

Applicant: Tomoyu YAMASHITA ,  Akiyoshi IRISAWA

Inventor： Tomoyu YAMASHITA ,  Akiyoshi IRISAWA

IPC: H04B10/04 ,  H04L27/00

CPC classification number: H03L7/22

Abstract: A frequency converter includes a first direct digital synthesizer that receives a signal having a predetermined frequency f_master as a clock signal and further an internal frequency setting signal, and outputs an internal signal having a frequency based on the internal frequency setting signal, and a second direct digital synthesizer that receives the internal signal as a clock signal, and further an output frequency setting signal, and outputs an output signal having a frequency f_slave (=f_master−Δ) based on the output frequency setting signal. A difference between the predetermined frequency f_master and the frequency of the internal signal is larger than a difference between the predetermined frequency f_master and the frequency f_slave of the output signal.

Abstract translation: 频率转换器包括：第一直接数字合成器，其接收具有预定频率f_master的信号作为时钟信号，并且还具有内部频率设置信号，并输出具有基于内部频率设置信号的频率的内部信号;以及第二直接 接收内部信号作为时钟信号的数字合成器，以及输出频率设定信号，并根据输出频率设定信号输出具有频率f_slave（= f_master-＆Dgr））的输出信号。 预定频率f_master与内部信号的频率之间的差异大于预定频率f_master与输出信号的频率f_slave之差。

公开(公告)号：US20080231850A1

公开(公告)日：2008-09-25

申请号：US12065658

申请日：2006-09-04

Applicant: Tomoyu Yamashita ,  Eiji Kato

Inventor： Tomoyu Yamashita ,  Eiji Kato

IPC: G01J3/00

CPC classification number: G01N21/3581 ,  G01M11/335

Abstract: A frequency resolution for measuring transmission characteristics of a device under test is increased. With a measuring device including a first terahertz light generator that generates incident light, a second terahertz light generator that generates reference light having an optical frequency f1−f2−fIF different from an optical frequency f1−f2 of the incident light by a constant difference frequency fIF, a terahertz light detector which outputs an light detection signal having the difference frequency fIF based on response light obtained by making the incident light incident to an optical fiber and the reference light, and a network analyzer that receives the light detection signal, thereby measuring characteristics of the optical fiber, a spectrum of the incident light (terahertz light) incident to the optical fiber includes the carrier frequency (f1−f2), but does not include sideband frequencies (f1−f2±fIF). It is thus possible to reduce the effective spectrum width of the incident light. As a result, the frequency resolution increases in the measurement of the transmission characteristics of the optical fiber.

Abstract translation: 用于测量被测设备的传输特性的频率分辨率增加。 利用包括产生入射光的第一太赫兹光发生器的测量装置，产生参考光的第二太赫兹光发生器，该参考光具有光学频率f 1 -f 2 -f 2， 与入射光的光学频率f 1 -f 2 2 不同于恒定差分频率f IF IF的“SUB”IF 基于通过使入射到光纤的入射光和参考光获得的响应光输出具有差频f IF IF的光检测信号的太赫兹光检测器，以及接收 光检测信号，由此测量光纤的特性，入射到光纤的入射光（太赫兹光）的光谱包括载波频率（f 1 -f 2/2），但不包括 边带频率（f 1 1 -f 2 2 + f IF IF）。 因此可以降低入射光的有效光谱宽度。 结果，在光纤的传输特性的测量中频率分辨率增加。

公开(公告)号：US07006207B2

公开(公告)日：2006-02-28

申请号：US10491787

申请日：2002-10-09

Applicant: Takeshi Ozeki ,  Tomoyu Yamashita ,  Motoki Imamura

Inventor： Takeshi Ozeki ,  Tomoyu Yamashita ,  Motoki Imamura

IPC: G01N21/00

CPC classification number: G01M11/333 ,  G01M11/336

Abstract: A device for measuring τPMD includes a polarization controller (12) that allows first (second) incident light, in a synthetic incident light to an object to be measured (30), to be in line with a p-polarization (s-polarization) axis in a polarization separator (16). The phase shift equivalent value (optical angle frequency differentiation) and amplitude equivalent value (square value) of a first (second) incident light component in an output from the polarization separator (16) measured by a first (second) measuring unit (20a, 20b) are respectively the phase shift equivalent value and amplitude equivalent value of a first column T11, T21 (second column T12, T22) when the transfer function matrix of the object (30) is a 2×2 matrix to thereby allow a control unit (2) to determine the polarization mode dispersion τPMD of the object (30).

Abstract translation: 用于测量tau PMD 的装置包括偏振控制器（12），该偏振控制器允许在与被测量物体（30）的合成入射光中的第一（第二）入射光符合 极化分离器（16）中的p偏振（s偏振）轴。 由第一（第二）测量单元（20a）测量的偏振分离器（16）的输出中的第一（第二）入射光分量的相移等效值（光学角度频率微分）和幅度等效值（平方值） ，20b）分别是第一列T 11，T 21（第二列T 12）的相移等效值和振幅当量值， ，当对象（30）的传递函数矩阵是2×2矩阵，从而允许控制单元（2）确定偏振模色散波形时， 的物体（30）。

公开(公告)号：US08481938B2

公开(公告)日：2013-07-09

申请号：US12731617

申请日：2010-03-25

Applicant: Shigeki Nishina ,  Motoki Imamura ,  Akiyoshi Irisawa ,  Tomoyu Yamashita ,  Eiji Kato

Inventor： Shigeki Nishina ,  Motoki Imamura ,  Akiyoshi Irisawa ,  Tomoyu Yamashita ,  Eiji Kato

IPC: G01J3/00 ,  G01J9/00

CPC classification number: G01N21/3581 ,  G01N21/3563

Abstract: According to the present invention, an electromagnetic wave measurement device includes an electromagnetic wave output device, an electromagnetic wave detector, a relative position changing unit, a delay period recording unit, a phase deriving unit, a delay-corrected phase deriving unit, a sinogram deriving unit, and an image deriving unit. The electromagnetic wave output device outputs an electromagnetic wave having a frequency equal to or more than 0.01 THz and equal to or less than 100 THz toward a device under test and a container storing at least a part of the device under test.

Abstract translation: 根据本发明，电磁波测量装置包括电磁波输出装置，电磁波检测器，相对位置改变单元，延迟周期记录单元，相位导出单元，延迟校正相位导出单元，正弦图 导出单元和图像导出单元。 电磁波输出装置向被测设备输出频率等于或大于0.01THz且等于或小于100THz的电磁波，以及容纳至少部分被测器件的容器。

公开(公告)号：US08183528B2

公开(公告)日：2012-05-22

申请号：US12487177

申请日：2009-06-18

Applicant: Eiji Kato ,  Shigeki Nishina ,  Motoki Imamura ,  Akiyoshi Irisawa ,  Tomoyu Yamashita

Inventor： Eiji Kato ,  Shigeki Nishina ,  Motoki Imamura ,  Akiyoshi Irisawa ,  Tomoyu Yamashita

IPC: G01R23/16

CPC classification number: G01N21/3581

Abstract: According to the present invention, the CT is carried out based on parameters other than the absorption rate. An electromagnetic wave measurement device includes an electromagnetic wave output device 2 which outputs an electromagnetic wave at a frequency equal to or more than 0.01 [THz] and equal to or less than 100 [THz] toward a device under test 1, an electromagnetic wave detector 4 which detects the electromagnetic wave which has transmitted through the device under test 1, a relative position changing unit 6 which changes a relative position of an intersection 100 at which an optical path of the electromagnetic wave transmitting through the device under test 1 and the device under test 1 intersect with respect to the device under test 1, a phase deriving unit 12 which derives, based on a detected result by the electromagnetic wave detector 4, a phase in the frequency domain of the electromagnetic wave which has transmitted through the device under test 1, a sinogram deriving unit 16 which derives a sinogram based on a derived result by the phase deriving unit 12, and a cross sectional image deriving unit 18 that derives, based on the sinogram, an image of a cross section of the device under test 1 including a trajectory of the intersection 100.

Abstract translation: 根据本发明，根据吸收速度以外的参数进行CT。 电磁波测量装置包括电磁波输出装置2，其以等于或大于0.01 [THz]且等于或小于100 [THz]的频率朝向被测设备1输出电磁波，电磁波检测器 4，其检测通过被测试装置1发送的电磁波;相对位置改变单元6，其改变通过被测试设备1发送的电磁波的光路和设备的相交位置100的相对位置; 测试1相对于被测设备1相交，相位导出单元12基于电磁波检测器4的检测结果，导出已经通过设备传输的电磁波的频域中的相位 测试1，基于相位导出单元12的导出结果导出正弦图的正弦图导出单元16，以及横截面ima ge导出单元18基于正弦图得出包括交会100的轨迹的被测设备1的横截面的图像。

公开(公告)号：US20110216791A1

公开(公告)日：2011-09-08

申请号：US12960841

申请日：2010-12-06

Applicant: Tomoyu YAMASHITA

Inventor： Tomoyu YAMASHITA

IPC: H01S3/13

CPC classification number: H01S3/1312 ,  H01S3/09415 ,  H01S3/1024 ,  H01S3/1305 ,  H01S3/1307

Abstract: According to the present inventions, a phase control device for laser light pulse includes a laser, a reference comparator, a measurement comparator, a phase difference detector and a loop filter. The laser outputs a laser light pulse. The reference comparator compares a voltage of a reference electric signal having a predetermined frequency and a predetermined voltage with each other, thereby outputting a result thereof. The measurement comparator compares a voltage based on a light intensity of the laser light pulse and a voltage of a measurement electric signal having the predetermined frequency, with a voltage of a phase control signal, thereby outputting a result thereof. The phase difference detector detects a phase difference between the output from the reference comparator and the output from the measurement comparator. The loop filter removes a high frequency component of an output from the phase difference detector. Further, the voltage of the phase control signal is different from the predetermined voltage. Furthermore, the laser changes the phase of the laser light pulse according to the output from the loop filter.

Abstract translation: 根据本发明，用于激光脉冲的相位控制装置包括激光器，参考比较器，测量比较器，相位差检测器和环路滤波器。 激光输出激光脉冲。 参考比较器将具有预定频率和预定电压的参考电信号的电压彼此进行比较，从而输出其结果。 测量比较器将基于激光光脉冲的光强度的电压和具有预定频率的测量电信号的电压与相位控制信号的电压进行比较，从而输出其结果。 相位差检测器检测来自参考比较器的输出与测量比较器的输出之间的相位差。 环路滤波器从相位差检测器去除输出的高频分量。 此外，相位控制信号的电压与预定电压不同。 此外，激光根据环路滤波器的输出改变激光脉冲的相位。

公开(公告)号：US20110001048A1

公开(公告)日：2011-01-06

申请号：US12731617

申请日：2010-03-25

Applicant: Shigeki NISHINA ,  Motoki IMAMURA ,  Akiyoshi IRISAWA ,  Tomoyu YAMASHITA ,  Eiji KATO

Inventor： Shigeki NISHINA ,  Motoki IMAMURA ,  Akiyoshi IRISAWA ,  Tomoyu YAMASHITA ,  Eiji KATO

IPC: G01J5/28

CPC classification number: G01N21/3581 ,  G01N21/3563

Abstract: According to the present invention, an electromagnetic wave measurement device includes an electromagnetic wave output device, an electromagnetic wave detector, a relative position changing unit, a delay period recording unit, a phase deriving unit, a delay-corrected phase deriving unit, a sinogram deriving unit, and an image deriving unit. The electromagnetic wave output device outputs an electromagnetic wave having a frequency equal to or more than 0.01 [THz] and equal to or less than 100 [THz] toward a device under test and a container storing at least a part of the device under test. The electromagnetic wave detector detects the electromagnetic wave which has transmitted through the device under test. The relative position changing unit changes a relative position of an intersection at which an optical path of the electromagnetic wave transmitting through the device under test and the device under test intersect with respect to the device under test. The delay period recording unit records a delay period of the electromagnetic wave caused by a transmission of the electromagnetic wave through the container. The phase deriving unit that derives, based on a detected result by the electromagnetic wave detector, a phase in the frequency domain of the electromagnetic wave which has transmitted through the device under test. The delay-corrected phase deriving unit that derives a delay-corrected phase obtained by subtracting an integral of the delay period with respect to the frequency from the phase. The sinogram deriving unit that derives a sinogram based on a derived result by the delay-corrected phase deriving unit. The image deriving unit derives, based on the sinogram, an image of a cross section of the device under test including the intersection.

Abstract translation: 根据本发明，电磁波测量装置包括电磁波输出装置，电磁波检测器，相对位置改变单元，延迟周期记录单元，相位导出单元，延迟校正相位导出单元，正弦图 导出单元和图像导出单元。 电磁波输出装置向受试装置输出频率等于或大于0.01 [THz]且等于或小于100 [THz]的电磁波，以及容纳至少部分被测器件的容器。 电磁波检测器检测已通过被测器件传输的电磁波。 相对位置改变单元改变通过被测设备传输的电磁波的光路与被测设备相对于被测设备相交的交点的相对位置。 延迟周期记录单元记录由电磁波的发射引起的电磁波的延迟时间通过容器。 基于电磁波检测器检测结果的相位导出单元，通过被测设备传输的电磁波的频域中的相位。 延迟校正相位导出单元，其导出通过从该相位减去相对于频率的延迟周期的积分而获得的延迟校正相位。 基于经延迟校正的相位导出单元的导出结果导出正弦图的正弦图导出单元。 图像导出单元基于正弦图导出被测设备的横截面的图像，包括交点。

公开(公告)号：US20100295534A1

公开(公告)日：2010-11-25

申请号：US12731483

申请日：2010-03-25

Applicant: Shigeki NISHINA ,  Motoki IMAMURA ,  Akiyoshi IRISAWA ,  Tomoyu YAMASHITA ,  Eiji KATO ,  Kodo KAWASE

Inventor： Shigeki NISHINA ,  Motoki IMAMURA ,  Akiyoshi IRISAWA ,  Tomoyu YAMASHITA ,  Eiji KATO ,  Kodo KAWASE

IPC: G01R23/02

CPC classification number: G01J5/0285 ,  G01N21/3563 ,  G01N21/3581 ,  G01N21/8806

Abstract: According to the electromagnetic wave measurement device of the present invention, an electromagnetic wave output device outputs an electromagnetic wave having a frequency equal to or more than 0.01 [THz] and equal to or less than 100 [THz] toward a device under test. An electromagnetic wave detector detects the electromagnetic wave which has transmitted through the device under test. A relative position changing unit changes a relative position of an intersection across which an optical path of the electromagnetic wave transmitting through the device under test and the device under test intersect with respect to the device under test. A characteristic value deriving unit derives a characteristic value of the electromagnetic wave based on a detection result of the electromagnetic wave detector while the characteristic value is associated with an assumed relative position which is the relative position if it is assumed that the electromagnetic wave is not refracted by the device under test. A first association correction unit changes the assumed relative position to an actual relative position, which is the relative position if the refraction of the electromagnetic wave by the device under test is considered, thereby associating the result derived by the characteristic value deriving unit with the actual relative position. A corrected characteristic value deriving unit that derives the characteristic value associated with a predetermined relative position based on an output from the first association correction unit.

Abstract translation: 根据本发明的电磁波测量装置，电磁波输出装置向被测设备输出等于或大于0.01 [THz]且等于或小于100 [THz]的频率的电磁波。 电磁波检测器检测已经通过被测设备的电磁波。 相对位置改变单元改变通过被测器件发送的电磁波的光路与被测器件相对于被测器件相交的相交位置的相对位置。 特征值导出单元基于电磁波检测器的检测结果导出电磁波的特征值，而如果假设电磁波未被折射，则特征值与作为相对位置的假定相对位置相关联 由被测设备 第一关联校正单元将所假定的相对位置改变为实际相对位置，如果考虑被测设备的电磁波的折射，则该相对位置是相对位置，从而将由特征值导出单元导出的结果与实际相对位置 相对位置。 校正特征值导出单元，其基于来自第一关联校正单元的输出导出与预定相对位置相关联的特征值。

公开(公告)号：US20100271001A1

公开(公告)日：2010-10-28

申请号：US12487177

申请日：2009-06-18

Applicant: Eiji KATO ,  Shigeki NISHINA ,  Motoki IMAMURA ,  Akiyoshi IRISAWA ,  Tomoyu YAMASHITA

Inventor： Eiji KATO ,  Shigeki NISHINA ,  Motoki IMAMURA ,  Akiyoshi IRISAWA ,  Tomoyu YAMASHITA

IPC: G01R23/16

CPC classification number: G01N21/3581

Abstract: According to the present invention, the CT is carried out based on parameters other than the absorption rate. An electromagnetic wave measurement device includes an electromagnetic wave output device 2 which outputs an electromagnetic wave at a frequency equal to or more than 0.01 [THz] and equal to or less than 100 [THz] toward a device under test 1, an electromagnetic wave detector 4 which detects the electromagnetic wave which has transmitted through the device under test 1, a relative position changing unit 6 which changes a relative position of an intersection 100 at which an optical path of the electromagnetic wave transmitting through the device under test 1 and the device under test 1 intersect with respect to the device under test 1, a phase deriving unit 12 which derives, based on a detected result by the electromagnetic wave detector 4, a phase in the frequency domain of the electromagnetic wave which has transmitted through the device under test 1, a sinogram deriving unit 16 which derives a sinogram based on a derived result by the phase deriving unit 12, and a cross sectional image deriving unit 18 that derives, based on the sinogram, an image of a cross section of the device under test 1 including a trajectory of the intersection 100.

Abstract translation: 根据本发明，根据吸收速度以外的参数进行CT。 电磁波测量装置包括电磁波输出装置2，其以等于或大于0.01 [THz]且等于或小于100 [THz]的频率朝向被测设备1输出电磁波，电磁波检测器 4，其检测通过被测试装置1发送的电磁波;相对位置改变单元6，其改变通过被测试设备1发送的电磁波的光路和设备的相交位置100; 测试1相对于被测设备1相交，相位导出单元12基于电磁波检测器4的检测结果，导出已经通过设备传输的电磁波的频域中的相位 测试1，基于相位导出单元12的导出结果导出正弦图的正弦图导出单元16，以及横截面ima ge导出单元18基于正弦图得出包括交会100的轨迹的被测设备1的横截面的图像。

公开(公告)号：US20100014079A1

公开(公告)日：2010-01-21

申请号：US12480042

申请日：2009-06-08

Applicant: Tomoyu YAMASHITA ,  Motoki IMAMURA

Inventor： Tomoyu YAMASHITA ,  Motoki IMAMURA

IPC: G01J3/40

CPC classification number: G01N21/3581 ,  G01J3/42 ,  G01J11/00

Abstract: An object of the present invention is to enable a change in a frequency for which an electric signal based on an optical signal is measured by a spectrum analyzer. An optical measurement device 1 includes a photoconductive switch 18 which receives predetermined pulse light from a first laser light source 11, and outputs terahertz light L1 having the same repetition frequency frep1 as the repetition frequency of the predetermined pulse light, a photoconductive switch 21 which receives the terahertz light L1 and a sampling light pulse L2, and outputs signal corresponding to a power of the terahertz light L1 at a time point when the sampling light pulse L2 is received, an RF spectrum analyzer 26 which measures a magnitude of the signal corresponding to a measured frequency which changes over time, an optical coupler 32 which outputs a simultaneous light pulse when the predetermined pulse light and the sampling light pulse L2 are simultaneously input, a photo detector 36 which converts the simultaneous light pulse into an electric signal as a trigger signal EXT, and an optical delay circuit 34 which delays the trigger signal EXT.

Abstract translation: 本发明的目的是能够通过频谱分析仪来测量基于光信号的电信号的频率的变化。 光学测量装置1包括接收来自第一激光光源11的预定脉冲光的光电导开关18，并输出具有与预定脉冲光的重复频率相同的重复频率frep1的太赫兹光L1，光接收开关21接收 太赫兹光L1和采样光脉冲L2，在接收采样光脉冲L2的时间点输出与太赫兹光L1的功率相对应的信号; RF频谱分析器26，其测量对应于 随时间变化的测量频率，当同时输入预定脉冲光和采样光脉冲L2时输出同时光脉冲的光耦合器32，将同步光脉冲转换为电信号作为触发器的光电检测器36 信号EXT以及延迟触发信号EXT的光学延迟电路34。